Polyatomic Ions- Names and Formulas

mercury (I) ion

Hg2+2

Ammonium ion

NH4+

Acetate Ion

C2H3O2-

Cyanide Ion

CN-

Dihydrogen phosphate ion

H2PO4-

hydrogen carbonate ion (bicarbonate)

HCO3-

Hydrogen sulfate ion (bisulfate)

HSO4-

Hydrogen sulfite ion (bisulfite ion)

HSO3-

hydroxide ion

OH-

Nitrate ion

NO3-

Nitrite ion

NO2-

Permanganate ion

MnO4-

Hyperchlorite ion

ClO-

Chlorite ion

ClO2-

Chlorate ion

ClO3-

Perchlorate

ClO4-

Hypobromite ion

BrO-

Bromite ion

BrO2-

Bromate ion

BrO3-

perbromate ion

BrO4-

Hypoiodite ion

IO -

iodite ion

IO2-

periodate ion

IO4-

Carbonate ion

CO3 charge -2

Chromate ion

CrO4 charge -2

Dichromate ion

Cr2O7 charge -2

Hyrdogen Phosphate ion

HPO4 charge -2

Oxalate ion

C2O4 charge -2

Peroxide ion

O2 charge -2

Sulfate ion

SO4 charge -2

Sulfite ion

SO3 charge -2

Thiosulfate ion

S2O3 charge -2

Phosphate ion

PO4 charge -3